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Diffstat (limited to '3rdParty/Boost/src/boost/smart_ptr/detail/array_allocator.hpp')
-rw-r--r-- | 3rdParty/Boost/src/boost/smart_ptr/detail/array_allocator.hpp | 318 |
1 files changed, 318 insertions, 0 deletions
diff --git a/3rdParty/Boost/src/boost/smart_ptr/detail/array_allocator.hpp b/3rdParty/Boost/src/boost/smart_ptr/detail/array_allocator.hpp new file mode 100644 index 0000000..4f9dc2b --- /dev/null +++ b/3rdParty/Boost/src/boost/smart_ptr/detail/array_allocator.hpp @@ -0,0 +1,318 @@ +/* + * Copyright (c) 2012-2014 Glen Joseph Fernandes + * glenfe at live dot com + * + * Distributed under the Boost Software License, + * Version 1.0. (See accompanying file LICENSE_1_0.txt + * or copy at http://boost.org/LICENSE_1_0.txt) + */ +#ifndef BOOST_SMART_PTR_DETAIL_ARRAY_ALLOCATOR_HPP +#define BOOST_SMART_PTR_DETAIL_ARRAY_ALLOCATOR_HPP + +#include <boost/align/align.hpp> +#include <boost/smart_ptr/detail/array_traits.hpp> +#include <boost/smart_ptr/detail/array_utility.hpp> +#include <boost/type_traits/alignment_of.hpp> + +namespace boost { + namespace detail { + struct ms_init_tag { }; + struct ms_noinit_tag { }; + + template<class T> + struct ms_allocator_state; + + template<class T> + struct ms_allocator_state<T[]> { + typedef typename array_base<T>::type type; + + ms_allocator_state(std::size_t size_, + type** result_) + : size(size_ * array_total<T>::size), + result(result_) { + } + + std::size_t size; + + union { + type** result; + type* object; + }; + }; + + template<class T, std::size_t N> + struct ms_allocator_state<T[N]> { + typedef typename array_base<T>::type type; + + ms_allocator_state(type** result_) + : result(result_) { + } + + enum { + size = array_total<T[N]>::size + }; + + union { + type** result; + type* object; + }; + }; + + template<class A, class T, class R> + class as_allocator + : public A { + template<class A_, class T_, class R_> + friend class as_allocator; + +#if !defined(BOOST_NO_CXX11_ALLOCATOR) + typedef std::allocator_traits<A> AT; + typedef typename AT::template rebind_alloc<char> CA; + typedef typename AT::template rebind_traits<char> CT; +#else + typedef typename A::template rebind<char>::other CA; +#endif + + public: + typedef A allocator_type; + +#if !defined(BOOST_NO_CXX11_ALLOCATOR) + typedef typename AT::value_type value_type; + typedef typename AT::pointer pointer; + typedef typename AT::const_pointer const_pointer; + typedef typename AT::void_pointer void_pointer; + typedef typename AT::const_void_pointer const_void_pointer; + typedef typename AT::size_type size_type; + typedef typename AT::difference_type difference_type; +#else + typedef typename A::value_type value_type; + typedef typename A::pointer pointer; + typedef typename A::const_pointer const_pointer; + typedef typename A::size_type size_type; + typedef typename A::difference_type difference_type; + typedef typename A::reference reference; + typedef typename A::const_reference const_reference; + typedef void* void_pointer; + typedef const void* const_void_pointer; +#endif + + template<class U> + struct rebind { +#if !defined(BOOST_NO_CXX11_ALLOCATOR) + typedef as_allocator<typename AT:: + template rebind_alloc<U>, T, R> other; +#else + typedef as_allocator<typename A:: + template rebind<U>::other, T, R> other; +#endif + }; + + typedef typename array_base<T>::type type; + + as_allocator(const A& allocator_, type** result) + : A(allocator_), + data(result) { + } + + as_allocator(const A& allocator_, std::size_t size, + type** result) + : A(allocator_), + data(size, result) { + } + + template<class U> + as_allocator(const as_allocator<U, T, R>& other) + : A(other.allocator()), + data(other.data) { + } + + pointer allocate(size_type count, const_void_pointer = 0) { + enum { + M = boost::alignment_of<type>::value + }; + std::size_t n1 = count * sizeof(value_type); + std::size_t n2 = data.size * sizeof(type); + std::size_t n3 = n2 + M; + CA ca(allocator()); + void* p1 = ca.allocate(n1 + n3); + void* p2 = static_cast<char*>(p1) + n1; + (void)boost::alignment::align(M, n2, p2, n3); + *data.result = static_cast<type*>(p2); + return static_cast<value_type*>(p1); + } + + void deallocate(pointer memory, size_type count) { + enum { + M = boost::alignment_of<type>::value + }; + std::size_t n1 = count * sizeof(value_type); + std::size_t n2 = data.size * sizeof(type) + M; + char* p1 = reinterpret_cast<char*>(memory); + CA ca(allocator()); + ca.deallocate(p1, n1 + n2); + } + + const A& allocator() const { + return static_cast<const A&>(*this); + } + + A& allocator() { + return static_cast<A&>(*this); + } + + void set(type* memory) { + data.object = memory; + } + + void operator()() { + if (data.object) { + R tag; + release(tag); + } + } + + private: + void release(ms_init_tag) { +#if !defined(BOOST_NO_CXX11_ALLOCATOR) + as_destroy(allocator(), data.object, data.size); +#else + ms_destroy(data.object, data.size); +#endif + } + + void release(ms_noinit_tag) { + ms_destroy(data.object, data.size); + } + + ms_allocator_state<T> data; + }; + + template<class A1, class A2, class T, class R> + bool operator==(const as_allocator<A1, T, R>& a1, + const as_allocator<A2, T, R>& a2) { + return a1.allocator() == a2.allocator(); + } + + template<class A1, class A2, class T, class R> + bool operator!=(const as_allocator<A1, T, R>& a1, + const as_allocator<A2, T, R>& a2) { + return a1.allocator() != a2.allocator(); + } + + template<class T, class Y = char> + class ms_allocator; + + template<class T, class Y> + class ms_allocator { + template<class T_, class Y_> + friend class ms_allocator; + + public: + typedef typename array_base<T>::type type; + + typedef Y value_type; + typedef Y* pointer; + typedef const Y* const_pointer; + typedef std::size_t size_type; + typedef ptrdiff_t difference_type; + typedef Y& reference; + typedef const Y& const_reference; + + template<class U> + struct rebind { + typedef ms_allocator<T, U> other; + }; + + ms_allocator(type** result) + : data(result) { + } + + ms_allocator(std::size_t size, type** result) + : data(size, result) { + } + + template<class U> + ms_allocator(const ms_allocator<T, U>& other) + : data(other.data) { + } + + pointer allocate(size_type count, const void* = 0) { + enum { + M = boost::alignment_of<type>::value + }; + std::size_t n1 = count * sizeof(Y); + std::size_t n2 = data.size * sizeof(type); + std::size_t n3 = n2 + M; + void* p1 = ::operator new(n1 + n3); + void* p2 = static_cast<char*>(p1) + n1; + (void)boost::alignment::align(M, n2, p2, n3); + *data.result = static_cast<type*>(p2); + return static_cast<Y*>(p1); + } + + void deallocate(pointer memory, size_type) { + void* p1 = memory; + ::operator delete(p1); + } + +#if defined(BOOST_NO_CXX11_ALLOCATOR) + pointer address(reference value) const { + return &value; + } + + const_pointer address(const_reference value) const { + return &value; + } + + size_type max_size() const { + enum { + N = static_cast<std::size_t>(-1) / sizeof(Y) + }; + return N; + } + + void construct(pointer memory, const_reference value) { + void* p1 = memory; + ::new(p1) Y(value); + } + + void destroy(pointer memory) { + (void)memory; + memory->~Y(); + } +#endif + + void set(type* memory) { + data.object = memory; + } + + void operator()() { + if (data.object) { + ms_destroy(data.object, data.size); + } + } + + private: + ms_allocator_state<T> data; + }; + + template<class T, class Y1, class Y2> + bool operator==(const ms_allocator<T, Y1>&, + const ms_allocator<T, Y2>&) { + return true; + } + + template<class T, class Y1, class Y2> + bool operator!=(const ms_allocator<T, Y1>&, + const ms_allocator<T, Y2>&) { + return false; + } + + class ms_in_allocator_tag { + public: + void operator()(const void*) { + } + }; + } +} + +#endif |